On the semigroup of fully indecomposable relations
On tolerance analysis
On types of fuzzy numbers under addition
We consider the question whether, for given fuzzy numbers, there are different pairs of -norm such that the resulting membership function within the extension principle under addition are identical. Some examples are given.
Operations, homomorphism and update versus relational database systems
Ordering D-classes and computing Schein rank is hard.
Ordinal ultrafilters versus P-hierarchy
An earlier paper [Starosolski A., P-hierarchy on βω, J. Symbolic Logic, 2008, 73(4), 1202–1214] investigated the relations between ordinal ultrafilters and the so-called P-hierarchy. The present paper focuses on the aspects of characterization of classes of ultrafilters of finite index, existence, generic existence and the Rudin-Keisler-order.
Parties floues compactes d'un ensemble
Perfect sets of independent functions
Periodic extensive measurement
Pinning for pairs of countable ordinals
Projections of relations
A projection of a relation is defined as a relation of reduced arity. The paper deals with projections of relations in coherence with their reflexivity, symmetry, completeness, regularity, cyclicity and other properties. Relationships between projections of hulls and hulls of projections are also studied.
Pseudodimension of relational structures
Quasi-regular Relations – A New Class of Relations on Sets
Ranks of binary relations.
Reflexive and antisymmetric relations and their systems
Regular elements of the semigroup of all binary relations.
Relational structures and dependence spaces
Relations à «éloignement minimum» de relations binaires. Note bibliographique
Relations and topologies
Relations d'équivalence co-analytiques